65816 Addressing mode: Stack (PEI) -- s
(PEI)
(2 bytes) (6 and 7 cycles)
+---------------+------------------+-----------------------+----------+
| Cycle | Address Bus | Data Bus |Read/Write|
+---------------+------------------+-----------------------+----------+
| 1 | PBR,PC | Op Code | R |
| 2 | PBR,PC+1 | Direct Offset | R |
| (2) 2a | PBR,PC+1 | Internal Operation | R |
| 3 | 0,D+DO | Absolute Address Low | R |
| 4 | 0,D+DO+1 | Absolute Address High | R |
| 5 | 0,S | Absolute Address High | W |
| 6 | 0,S-1 | Absolute Address Low | W |
+---------------+------------------+-----------------------+----------+
(2) Add 1 cycle for direct register low (DL) not equal 0.
See also: Abbreviations